I have the mov file url which I have to play using videoview. But android does not support that as per http://developer.android.com/guide/appendix/media-formats.html
So is there any way to play mov ulr video using video view or remultiplex (or re-encode, depending on the source) into an something that Android plays nice with, e.g. an mp4 container?
You can use ffmpeg to convert the file on the device if necessary, but integrating ffmpeg is not trivial and converting a video on the device is compute intensive so will take time and use up your battery. If it is possible to change the format server side, it is generally much easier.
If you do want to use ffmpeg, a wrapper approach my be useful - this project provides an example: https://github.com/jhotovy/android-ffmpeg. I have used a similar approach and it works fine.
Make sure in particular you note the comments about calling ffmpeg twice.
There are players in Google play that will play mov files, but not everyone has had good experience with them (for example: https://stackoverflow.com/a/27006587/334402). VLC in particular is a common choice and projects exist to integrate it into Android apps (although maybe not via web views) e.g.: https://github.com/mrmaffen/vlc-android-sdk
Related
I am new to android. I have two files of same length, One is audio file and one is video file with no audio. I want to make a video with audio by combining these two files. Help me to achieve this task.
I assume you have native Android app and familiarity with Java (or know porting the code in native C) and are willing to use other open-source classes in your project.
This is what you might give a head-start: Since this project is not actively maintained now, you might have to fork and use their logic into your code.
https://github.com/tqnst/MP4ParserMergeAudioVideo
Another alternative is using ffmpeg port for Android (however I am not sure how this works natively).
https://github.com/WritingMinds/ffmpeg-android-java
I have to modify the Http Live Streaming implementation of Android Media Player.
The implementation is under the stagefright library
http://androidxref.com/4.0.4/xref/frameworks/base/media/libstagefright/httplive/LiveDataSource.cpp
I think these library will compile to a libstagefright.so which should be part of the Android system.
My question is if I make some changes to this library and compile a new libstagefright.so.
If I load this new libstagefright.so in my new application and call up the media player, will it use the code in my new libstagefright.so?
You will not be able to replace the original library, since when you try to loadLibrary it will load the library from within /system/lib. So unless you replace that (which is not possible on unrooted devices), you won't be able to load your custom code.
https://github.com/android/platform_system_core/blob/66ed50af6870210ce013a5588a688434a5d48ee9/rootdir/init.environ.rc.in sets the LD_LIBRARY_PATH by default. And loads it from these paths if available. If not, then your application's lib directory will be searched; but not the other way around.
I tried this with libwebkit.so in the past on various mainstream devices and haven't had any luck getting it to load instead of the one in /system/lib.
You can learn more by looking at:
doLoad from here https://android.googlesource.com/platform/libcore/+/41d00b744b7772f9302fdb94dddadb165b951220/luni/src/main/java/java/lang/Runtime.java
findLibrary here http://developer.android.com/reference/dalvik/system/BaseDexClassLoader.html#findLibrary(java.lang.String)
I'm pretty sure you can't replace the default class loader either for security reasons.
What you can do, though, is a straightforward fork the Media Player and have it load your modified libstagefright-modified.so. There could be other solutions, haven't looked at Media Player's code.
Knowing that all you want to do is parse the data before it gets to the MediaPlayer, I suggest not trying to alter the Android libraries. As soulseekah mentioned, it's not going to work without a rooted device. There are other options, although they both have drawbacks.
1) If you are only targeting recent versions (4.2 or later, I believe), you can take a look at new classes added to the android.media package, like MediaExtractor and MediaCodec. I'm not greatly familiar with those because they aren't available on the hardware with which I work, but they could be useful in getting to the raw data. Here is a decent sample of using them to play video. The drawback is those classes aren't available in earlier versions.
2) The other option is to put a local proxy on the device. Connect the MediaPlayer to the proxy and make the request to the media server yourself. See my answer here for a little more info on that. With a proxy, you will see all the data that comes through, giving you a chance to parse the ID3 tags. There is the drawback that you will have to parse the TS packets to put together an elementary stream (essentially doing the demuxer's job), but it will work with any version of Android. TS streams aren't difficult to disassemble, and ID3 tags aren't time consuming to parse, so I think this is a reasonable approach.
We need an Android app that can encode a folder of images to a video. I have been looking for solutions a while now, but cannot find anything good. The Android API does not support it. We are trying ffmpeg, but cannot get it to work. We need a working solution, using ffmpeg is not mandatory. A full Android Java solution is also a possibility, since this would work on all Android devices, possibly at the cost of some performance.
The app also needs to be able to add an audio track to the movie if the user chooses to do this.
Any help would be appreciated.
Kind regards,
Aäron
From the FFmpeg FAQ entry "How do I encode single pictures into movies?":
First, rename your pictures to follow a numerical sequence. For example, img1.jpg, img2.jpg, img3.jpg,... Then you may run:
ffmpeg -f image2 -i img%d.jpg /tmp/a.mpg
Adding an audio track should just involve add another input (e.g., -i audio.mp3), but could also require explicit -maping with older versions.
I am working on an Android application which is supposed to play videos over HTTP on Android devices. Before we setup a server to host the video files just wanted a few things clarified:
As per the developer documentation, Android supports .mp4 and .3gp container formats for video. If we use H.263(video) - AAC LC (Audio) audio-video codec used for our media files will we be able to play the video by passing the URL to MediaPlayer class?
I did a little experiment and passed URL of one of the video files(.mp4) to the MediaPlayer class and got the following error:
Command PLAYER_INIT completed with an
error or info
PVMFErrContentInvalidForProgressivePlayback
From the docs, I came to know that for progressive playback, the video's index (e.g moov atom) should be at the start of the file.
Questions:
1. How do we make our videos Android-ready?
2. What are the different considerations that we need to make?
Please help.
Thanks.
You can actually achieve this using a pure Java implementation of ISO BMF ( MP4 ) container used JCodec ( http://jcodec.org ). For this use the following code:
MovieBox movie = MP4Util.createRefMovie(new File("bad.mp4"));
new Flattern().flattern(movie, new File("good.mp4"));
The side effect of 'Flattern' is creating a web optimized movie file that has it's header BEFORE the data.
You can also use similar functionality from command line:
java -cp jcodec-0.1.3-uberjar.jar org.jcodec.movtool.WebOptimize <movie>
The JCodec library can be downloaded from a project website.
I cross posted this question on Android-developers google group. Mark answered it there. Thanks Mark!
See this thread
Strangely I find no support for Midi in Android.
The only thing that comes close is the Jetplayer, but this only takes a existing .jet file.
I want to dynamically generate a midi file with some intervals and play it.
I even thought about just manually creating a .jet file with a tone and then transposing it with the jet player, but it limits the transposing to -12, +12. Which is not so good for me.
There also is a ToneGenerator on Android, but it's limited to predefined tones with no way to transpose.
Does someone know how to achieve midi generation and playback on Android?
Perhaps this Pragmatic Programmer thread might be of interest.
I currently settled for the dynamic generation of midi files that then are fed to the MediaPlayer. It's quite easy to build a simple midi file generator and the MediaPlayer works correctly with it.
I do have opened a feature request for direct streaming access to the synthesizer. If you are interested in streaming midi, please rate, star, comment there.
Better late than never, but there's a bare-bones Java MIDI library on Google Code here: http://code.google.com/p/android-midi-lib/
That can handle MIDI file generation and you can use MediaPlayer to play it back supposedly.